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      11-21-2023, 10:18 AM   #6
Raimo5
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Drives: BMW 740d xDrive (G11)
Join Date: Feb 2023
Location: Estonia

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Air suspension compressor is handled by basic electrical system, which would be your 105Ah AGM in the luggage compartment.

Additional electrical system battery (60Ah) under the bonnet doesn't run anything directly. It is connected to PCM (Power Control Module) which is a DC/DC converter and feeds power back to basic electrical system during start-stop procedures to relieve system load and cycling.
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Recon3D14.00